package com.starsky.common.util;

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateFormatUtils;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.management.ManagementFactory;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * 时间工具类
 *
 * @author kyson
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    public static final String YMDHMS = "yyyy-MM-dd HH:mm:ss";
    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 将日期字符串格式化为制定格式日期字符串
     * 默认格式化 yyyy-MM-dd HH:mm:ss
     *
     * @param date:                     日期
     * @param regex：格式化表达式，默认yyyy-MM-dd HH:mm:ss
     * @return
     */
    public static String format(Date date, String regex) {
        if (StringUtils.isEmpty(regex)) {
            regex = YMDHMS;
        }
        if (date == null) {
            date = new Date();
        }
        SimpleDateFormat dateFormat = new SimpleDateFormat(regex);
        return dateFormat.format(date);
    }

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }


    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(String str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str, parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }


    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    public static Date parseDateForStart(String dateStr) {
        String start = dateStr + " 00:00:00";
        Date date = parseDate(start);
        return date;
    }

    public static Date parseDateForEnd(String dateStr) {
        String end = dateStr + " 23:59:59";
        Date date = parseDate(end);
        return date;
    }

    /**
     * 计算两个日期相差天数
     *
     * @param endDate
     * @param startDate
     * @return
     */
    public static Integer getDiffDay(Date endDate, Date startDate) {
        Long timestampDiff = endDate.getTime() - startDate.getTime();
        int ceil = (int) Math.ceil(timestampDiff / (24 * 60 * 60 * 1000));
        return ceil;
    }


    /**
     * @param startDate
     * @param firstDayOfWeek
     * @return
     */
    public static Calendar getFirstDayOfWeek(String startDate, int firstDayOfWeek) {
        Date sDate = parseDate(startDate);
        Calendar sCalendar = Calendar.getInstance();
        sCalendar.setFirstDayOfWeek(firstDayOfWeek);
        sCalendar.setTime(sDate);
        return sCalendar;
    }

    /**
     * 获取某周得第一天
     *
     * @param year 年
     * @param week 周
     * @return
     */
    public static String getFirstDayOfWeek(int year, int week) {
        Calendar c = new GregorianCalendar();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.WEEK_OF_YEAR, week);
        c.setFirstDayOfWeek(Calendar.MONDAY);
        c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek());
        c.set(Calendar.HOUR, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        return sdf.format(c.getTime());
    }

    /**
     * 获取某周得最后一天
     *
     * @param year 年
     * @param week 周
     * @return
     */
    public static String getLastDayOfWeek(int year, int week) {
        Calendar c = new GregorianCalendar();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.WEEK_OF_YEAR, week);
        c.setFirstDayOfWeek(Calendar.MONDAY);
        c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 5);
        c.set(Calendar.HOUR, 23);
        c.set(Calendar.MINUTE, 59);
        c.set(Calendar.SECOND, 59);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        return sdf.format(c.getTime());
    }


    /**
     * 调用API接口判断日期是否是工作日 周末还是节假日
     * 工作日对应结果为 0, 休息日对应结果为 1, 节假日对应的结果为 2
     *
     * @param dateStr: 日期，格式为 yyyyMMdd
     */
    public static int getHoliday(String dateStr) {
        int d = 0;//工作日对应结果为 0, 休息日对应结果为 1, 节假日对应的结果为 2
        try {
            String httpUrl = "http://www.easybots.cn/api/holiday.php?d = " + dateStr;
            URL url = new URL(httpUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();

            InputStream is = connection.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            String strRead = null;
            StringBuffer sbf = new StringBuffer();
            while ((strRead = reader.readLine()) != null) {
                sbf.append(strRead);
                sbf.append("\r\n");
            }
            reader.close();

            String result = sbf.toString();
            JSONObject ob = JSONObject.parseObject(result);
            if (ob != null) {
                d = Integer.parseInt(ob.getString(dateStr));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return d;
    }

    /**
     * 判断今天是否是工作日 周末 还是节假日
     *
     * @param currentDate
     * @param days
     * @return
     */
    public static Date getDate(Date currentDate, int days) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(currentDate);
        int i = 0;
        while (i < days) {
            calendar.add(Calendar.DATE, -1);//整数往后推日期,负数往前推日期
            i++;
            if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY ||
                    calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
                i--;
            }
        }
        SimpleDateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println(dateformat.format(calendar.getTime()));
        return calendar.getTime();
    }

}
